利用“分割法和填补法”计算多边形的面积ppt课件

多邊形面積,分割法及填補法,開始,1,18cm,4cm,8cm,3cm,20cm,10cm,分割法,填補法,請選擇以甚麼方法去計算左圖的面積,問題一,2,利用填補法似乎更合適!試試填補法吧!,問題一,填補法,3,下一題,20 x10,200,12,24,6x2,8x3,200-12-24,164,4,分割法,填補法,請選擇以甚麼方法去計算左圖的面積,6cm,4cm,4cm,10cm,8cm,4cm,5,下一題,4cm,14x10,6x62,4x4,140,16,18,140-16-18,106,cm2,6,分割法一,8cm,6cm,4cm,4cm,10cm,請選擇那一種分割法,分割法二,8cm,6cm,4cm,4cm,10cm,4cm,4cm,分割法二,8cm,6cm,4cm,4cm,10cm,7,下一題,4cm,cm2,(8+14)x62,10 x4,66,40,66+40,106,8,下一題,4cm,cm2,(4+10)x62,10 x4,6x4,24,40,42,24+40+42,106,9,6m,8m,16m,12m,分割法,填補法,請選擇以甚麼方法去計算左圖的面積,10,利用填補法似乎更合適!試試填補法吧!,填補法,11,全圖面積:,下一題,16x14,4x62,224,12,224-12,212,12,2cm,2cm,4cm,3cm,4cm,6cm,9cm,分割法,填補法,請選擇以甚麼方法去計算左圖的面積,13,利用分割法似乎更合適!試試分割法吧!,分割法,14,下一題,7x42,7x3,6x3,14,21,18,14+21+18,53,15,3cm,3cm,4cm,3cm,2cm,4cm,分割法,填補法,請選擇以甚麼方法去計算左圖的面積,16,請選擇那一種分割法,3cm,3cm,4cm,3cm,2cm,4cm,分割法一,3cm,3cm,4cm,3cm,2cm,4cm,分割法二,17,下一題,4x3,6x2,10 x3,12,12,30,12+12+30,54,cm2,18,下一題,9x3,5x3,4x3,27,15,12,27+15+12,54,19,請選擇那一種填補法,填補法一,3cm,3cm,4cm,3cm,2cm,4cm,D,E,填補法二,3cm,3cm,4cm,3cm,2cm,4cm,D,E,20,下一題,10 x9,4x3,6x4,90,12,24,90-12-24,54,21,下一題,10 x9,7x4,4x2,90,28,8,90-28-8,54,22,10mm,8mm,15mm,12mm,15mm,40mm,分割法,填補法,請選擇以甚麼方法去計算左圖的面積,23,利用分割法似乎更合適!試試分割法吧!,分割法,24,下一題,40 x10,(8+14)x132,400,143,400+143,543,25,分割法,填補法,請選擇以甚麼方法去計算左圖的面積,8cm,5cm,12cm,37cm,12cm,18cm,9cm,26,利用填補法似乎更合適!試試填補法吧!,填補法,27,下一題,(29+37)x182,(8+12)x92,594,90,594-90,504,28,分割法,填補法,請選擇以甚麼方法去計算左圖的面積,10cm,6cm,10cm,6cm,14cm,10cm,7cm,7cm,10cm,14cm,29,下一題,34x10,(6+14)x72,(6+14)x72,340,70,70,340+70+70,480,30,下一題,34x24,(10+14)x72,84x4,816,84,336,816-336,480,31,分割法,填補法,請選擇以甚麼方法去計算左圖的面積,12cm,36cm,8cm,12cm,10cm,24cm,32,利用分割法似乎更合適!試試分割法吧!,分割法,33,下一題,(12+36)x242,(8+12)x102,576,100,576+100,676,34,分割法,填補法,請選擇以甚麼方法去計算左圖